# Validation Data Files

This folder contains satellite-fluoroprobe validation statistics and matchup data for Lake Kinneret chlorophyll-a retrievals (2017-2023).

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## Files

### 1. fluoroprobe_validation_matchups_clean.csv

**Description:** Individual matchup pairs between satellite and fluoroprobe measurements

**Content:**
- **394 matchups** across 5 monitoring stations (A, D, G, H, K)
- Temporal window: ±3 days
- Spatial matching: 110m radius for Stations A, G, H, K; 750m radius for Station D
- Quality-controlled (outliers removed)

**Columns:**
- `station` - Monitoring station (A, D, G, H, K)
- `station_lat` - Station latitude (decimal degrees)
- `station_lon` - Station longitude (decimal degrees)
- `location` - Station name
- `fp_date` - Fluoroprobe measurement date
- `sat_date` - Satellite acquisition date/time
- `time_diff_days` - Temporal difference (days)
- `fp_chl` - Fluoroprobe chlorophyll-a (μg/L, depth-integrated 0-10m)
- `sat_chl` - Satellite chlorophyll-a (μg/L, surface)
- `pixel_count` - Number of valid satellite pixels
- `residual` - Satellite minus fluoroprobe (μg/L)

**Matchups by station:**
- Station A: 101 matchups
- Station D: 70 matchups
- Station G: 95 matchups
- Station H: 80 matchups
- Station K: 48 matchups

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### 2. fluoroprobe_validation_statistics_clean.csv

**Description:** Per-station validation statistics

**Metrics:**
| Station | N   | R²    | RMSE (μg/L) | Bias (μg/L) |
|---------|-----|-------|-------------|-------------|
| A       | 101 | 0.50  | 8.73        | -6.56       |
| D       | 70  | 0.157 | 9.00        | -1.10       |
| G       | 95  | 0.58  | 8.58        | -5.99       |
| H       | 80  | 0.32  | 7.42        | -4.28       |
| K       | 48  | 0.15  | 9.43        | -7.66       |

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### 3. overall_validation_statistics.csv

**Description:** Overall validation statistics across all 5 stations

**Metrics:**
- N = 394 matchups
- R² = 0.347
- RMSE = 8.59 μg/L
- Bias = -5.12 μg/L
- Slope = 0.50

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### 4. seasonal_validation_statistics_clean.csv

**Description:** Validation statistics by season (all 5 stations combined)

Seasonal matchups: Winter=129, Spring=84, Summer=59, Fall=122 (total=394)

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### 5. station_seasonal_validation_statistics_clean.csv

**Description:** Station x season validation statistics (all 5 stations)

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### 6. laboratory_fluoroprobe_matchups.csv

**Description:** Laboratory chlorophyll vs fluoroprobe matchups (Station A, n=133)

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### 7. laboratory_satellite_matchups.csv

**Description:** Laboratory chlorophyll vs satellite matchups (Station A, n=68)

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## Validation Summary

**Overall (5 stations, n=394):**
- R² = 0.347
- RMSE = 8.59 μg/L
- Bias = -5.12 μg/L
- Slope = 0.50

**Best performance:** Station G (R²=0.58, RMSE=8.58 μg/L)
**Lowest bias:** Station D (Bias=-1.10 μg/L)

**Station D Note:**
- Uses 750m spatial radius (vs 110m for other stations)
- Nearshore location with limited satellite coverage

